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Waterproof Hibernating Asset Tracking Device


The GL505 is a powerful waterproof GPS tracker designed for fixed asset tracking applications. It is powered by user replaceable CR123A lithium battery pack. Configuration allows it to wake up on a preset schedule to check if it needs to shift from dormant to active status and/or send update of its current location, then returning to a dormant state. Optimally configured, it will operate autonomously for 1800 days. Its built-in 3-axis accelerometer allows the GL505 to detect asset movement and transmit an alert message. The integrated @Track interface protocol allows the GL505 to communicate with a customer mobile phone or a backend server via GPRS/SMS and transfer reports of GPS position, etc. System integrators can easily incorporate the GL505 into existing tracking systems based on this full featured protocol.



  • Waterproof, IPX7 compliant
  • Low power consumption, long standby time for more than 1800 days
  • Internal u-blox chipset
  • Quad band GSM/GPRS 850/900/1800/1900 MHz
  • Embedded @Track protocol
  • Internal 3-axis accelerometer for motion detection
  • Internal GSM antenna
  • Internal GPS antenna





GSM Specifications

Quad band: 850/900/1800/1900 MHz
Compliant to GSM phase 2/2+
-Class 4 (2W @ 850/900 MHz)
-Class 1 (1W @ 1800/1900 MHz)
GPRS multi-slot class 8
GPRS mobile station class B
RMS Phase Error 5 deg
Max Out RF Power GSM850/GSM900: 29.0±2 dBm

DCS/PCS: 30.0±2 dBm

Dynamic Input Range -15 ~ -108 dBm
Receiver Sensitivity Class ⅡRBER 2% (-107dBm)
Stability Of Frequency < 2.5 ppm
Max Frequency Error ±0.1 ppm

GPS Specifications

GPS Chipset u-blox All-In-One GPS receiver

Autonomous: -147 dBm

Hot start: -156 dBm

Reacquisition: -160 dBm

Tracking: -162 dBm

Position Accuracy
Autonomous : < 2.5 m 
SBAS : 2.0 m
TTFF (Open Sky)

Cold start: 27s average

Warm start: 27s average

Hot start: 1s average


GSM  Antenna Internal only
GPS Antenna Internal only
Internal Indicator LED GSM, GPS and battery status
Serial Port  Internal 8 pin connector for upgrading or debugging

General Specifications

Dimensions 118mm * 69.5mm * 26.8mm
Weight 140g (with batteries)
Batteries Three CR123A Lithium batteries 1500 mAh
Standby Time

Standby current: < 10 uA

SMS count: 1950 SMS

SMS reporting standby:

    One SMS report per day: 1950 days

TCP reporting standby:

    One report per day: 1800 days

    Four reports per day: 510 days

    Five minutes reporting: 11 days

Water Resistance IPX7 compliant
Operating Temperature -20℃ ~ +60℃

Air Interface Protocol

Command Set @Track protocol commands

Simple SMS commands 

Transmit Protocol TCP, UDP, SMS
Working Mode  Power save mode, for long standby time  

Continuous Mode, for emergency tracking 

Scheduled Timing Report Report position and status according to preset time schedules
Geo-fence Supports up to 5 geo-fence regions
Low Power Alarm Alarm when internal battery is low
Temperature Alarm  According to the pre-set temperature range
Motion Detection  Motion alarm trigger and optional change of working mode
Wakeup Report  Report when the device wakes up 



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